If you put incorrect information on your application you should correct them as soon as you realized it. If IRCC finds out that will not be a good thing for the application. They could label it as misrepresentation. Mistakes happen and you can always fix it.
The instruction will be outlined on your test invitation letter. If you received the AOR by email, then most likely you will get the test invitation by email too. So you will have to bring the print out copy of the letter and that will consider as original because hey will never send you another...
Please add to the spreadsheet (child)
Physical Presence Days: 1,000
App Sent: Feb 27, 2018
App Recd: Feb 28, 2018
AOR: Mar 20, 2018
In Process: May 14, 2018
The person ( Immigration consultant ) who helped me preparing my Citizenship application told me that those who are getting AOR in 2 weeks or less are an indication the application is very easily identifiable for the completeness of the application at preliminary sorting. For example signature...